diff options
| author | Nikhil Badola | 2014-02-26 17:43:15 +0530 |
|---|---|---|
| committer | York Sun | 2014-04-22 17:58:48 -0700 |
| commit | 11856919f267d00155f571c75dd68ba1bb98729b (patch) | |
| tree | 9fa82f234f3245440a31bf30550711fae0b3bf87 /drivers | |
| parent | c60dee03c019be312e83fcab9c294c5a4cf7c1bd (diff) | |
fsl/usb: Workaround for USB erratum-A007075
Put a delay of 5 millisecond after reset so that ULPI phy
gets enough time to come out of reset. Erratum A007075 applies
to following SOCs and their variants, if any
P1010 rev 1.0
B4860 rev 1.0, 2.0
P4080 rev 2.0, 3.0
Signed-off-by: Nikhil Badola <nikhil.badola@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/host/ehci-fsl.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c index 3fd9e13af8a..1d012db92e6 100644 --- a/drivers/usb/host/ehci-fsl.c +++ b/drivers/usb/host/ehci-fsl.c @@ -14,6 +14,7 @@ #include <asm/io.h> #include <usb/ehci-fsl.h> #include <hwconfig.h> +#include <asm/fsl_errata.h> #include "ehci.h" @@ -47,6 +48,15 @@ int ehci_hcd_init(int index, enum usb_init_type init, usb_phy[0] = '\0'; #endif + if (has_erratum_a007075()) { + /* + * A 5ms delay is needed after applying soft-reset to the + * controller to let external ULPI phy come out of reset. + * This delay needs to be added before re-initializing + * the controller after soft-resetting completes + */ + mdelay(5); + } memset(current_usb_controller, '\0', 5); snprintf(current_usb_controller, 4, "usb%d", index+1); |